SIGMA LAMINAR AIR FLOW UNITS

Introduction :Sigma Laminar Flow Cabinets Provide the exacting conditions of air cleanliness now required for many processes in such fields as electronic manufacture, medical research, pharmaceutical processing particularly for inject able and vaccines, hospitals and food packaging. They allow work to be performed in an atmosphere free from dust particles and bacteria. SIGMA Laminar Flow Cabinets exceed the highest requirements of Standard Class 100 -where the level of contamination must not exceed 100 Particles of 0.5 microns, or larger, per cubic foot of air within the working area.

•Zero Bacteria count is assured in the working area, within a few minutes of switching on the Laminar Flow
• Low noise level operation and guaranteed leak-free filters.
• Fully tested prior to despatch and issued with test certificate zero bacteria
count in working area. * Easy maintenance (Low cost SIGMA Service contract available)
• Good operator access-sting or standing. Specifications

Air Flow:
90 ft. per minute, (0,45m/sec) -+15ft. /min. (0.8m/sec) over filter face Minimal variation means less turbulence & less contamination

Pre-filter: SIGMA dry fabric air filter Efficiency 98% down to 5 microns Testing standard: BSEN -779

Final Filter: SIGMA Absolute Air filter of Efficiency 99.97% down to 0.3 microns Contamination Level: U.S. Federal Standard 209 E Class 100 less than 100 particles per cu. ft. of 0.5 microns or larger. Nil particles larger than 5 microns, zero Bacterial count in work area

Noise Level:
Typical: Within range of 65 db. Fans Fully balanced, direct driven motor. Adequate capacity to cope with double initial filter pressure drop for maximum filter life.
Light Intensity / 900-1300 Lux at work surface.

Electric:
Single – phase 220/250 Volt. 50 Hz prewired to junction box. Starting switch for motor Lighting switch.

SIGMA KITCHENS GREASE STOP FILTERS

Introduction : These Filters designed specifically for kitchen exhaust system. These Filters plays an important role to remove oil droplets, vaporous and hot air from kitchen through exhaust system. These Filters are of following shapes i.e.. 1) 2 2 half ‘C type 2) Complete ‘C’ type 3) ‘V’shape type.

Construction : The kitchen grease stop Filter manufactured in Alu. and S.S. Metal sheet. It is installed in vertical inclined position in the exhaust system plenum. The collected oil drops drains through the drain holes of the filter to drain line. These Filters having buffing, and glazed finished area. These Filters are washable type and these Filters having some std. sizes which are following.

Sr. No.	Filter Size	Air Flow Rate(C F M)
1	610X610X50	1000
2	635X508X50	900
3	508X508X50	800
4	635X406X50	700
5	508X406X50	650

SIGMA VISCOUS PANEL TYPE AIR FILTERS

Introduction :The sigma filters research center has developed an efficient, economical and durable design for metallic mesh air filters
ideal for comfort and industrial air conducting and ventilation applications.
Applications: Designed specifically for comfort and industrial air conditioning in T. V. Studios, Office buildings. Hostels, Cinema Houses, Factories.
Constructions : The filter element is constructed from several layers of corrugated G. I. Alu, Ss., sys. Wiremesh, inter spaced with a flat layer of G.I. Ss. Alu-Wire mesh. The pleated formation of the filter media ensures maximum filtration of the filter media
ensures maximum filtration area in ratio to the face area, nominal differential pressure and high dust retention capacity. The filter element is encased in an Aluminium frame, fitted with Aluminium expanded metal on each side. The filter units are made in standard size and are interchangeable.
Performance : This unit has an efficiency, dust collection rating of 70%- 80%.The filter unit is required to be impregnated with light mineral oil at regular service periods – depending upon actual working conditions. The separating efficiency of the viscous filter unit depends upon entirely the regularity of this roiling process. This viscous crimped mesh impingement filter enjoys a major advantage over the packed ferrules type media which has a tendency to sink in the filter frame, thereby causing a gap for the passage of unfiltered air. The Filter units are tested as per BSEN – 779
Operation Conditions: The filter unit can be used under conditions of humidity up to and including 100% R. H. Installation: Filter units may be mounted in multiple banks to cater to large volumes of airflow. The units can be mounted on angle iron frames. Specially designed outlet ducts can be supplied for attaching to the frame work of the filter units for fitment with the existing duct. The filter units are made in standard sizes and are interchangeable.